Improvement in vehicle-spring equalizers



n. 0 MA R'KHAM. Vehicle-Spring Equalizer. No 198,948.

Patent edjan. 8,1878.

M W m 3W zZiiesaes;

7 bars orpillow-block s. v izes the action of the springs by links, and,

UNITED STATES PATEN Or'ruon.

-DEWITT O. MARKHAM, OF GOLLINSVILLE, NEW YORK.

IMPROVEMENT IN VEHICLE-SPRING EQUALIZERS.

Specification forming part of Letters Patent No. 198,948, dated J anuary'8, 1878 application filed i June 29, 1877.

'appertains to make and use the same, referand to the letters of reference marked thereon, which form a part of this specification.

Ihave improved the means for equalizing ence being had to the accompanying drawings,

the action and preventing the undue expansion of the springs of avehicle. Spring-equalizing devices have been used in connection with means for preventing the too great expansion of the springs; and I do not claim, broadly, devices for effecting these results.

In my plan the device is arranged to act in connection with the reach of the running-gear, to prevent the too great expansion of the springs, and it has no direct attachment to the springs, but is connected directly to the running-gear of the vehicle and to the spring- The cranked rod equalwhether it is arranged along the reach or across the reach, a stop-arm is arranged upon said rod, in position to turn away from the reach when the springs are compressed; but the ex- 7 pansion of thelatter beyond their normal con dition brings the stop-arm in contact with the reach, and stops the rod fromturning and the springs from opening too much.

This construction is durable and easily applied.

In the drawings, Figure 1 represents a top view, showing my improvement applied to elliptical and side springs; Fig. 2, a longitudinal section 5 Fig. 3, a cross-section and Fig. 4 the crank-rod, with its stop-arm for action with the reach.

The device may be applied to elliptical or tr; side springs, and the drawings show both p ans. I r

The crank-rod A lies upon the reach B, and

The crank-rod has a stop or arm, H, ar

ranged to act upon the reach B, and prevent the springs from opening too far by preventing the cranks from rising above the point of the normal expansion of the springs. The

crank-rod having the stop-arm, in combinanation with the reach, serves to equalize the springs and to prevent injuring them by too great expansion, and makes a very simple and durable appliance for the purpose.

In adapting the device for side springs the links are connected to the pillow-blocks I I, and the crank-rod has its hearings in side bars or additional reaches J J fastened into the hind axle and the bolster. In both cases the stop-arm H acts in the same manner to open or turn away from the reach as the springs are compressed, and to abut against the reach when the springs open to their fullest extent,

and stop them from expanding beyond such point.

I claim- The crank-rod A E, provided with the in termediate extension H, and journaled in the frame beneath the springs, in combination with the reach B and the connecting-links F, pivoted to either the springbar G or the pillow-block I, all constructed and arranged as shown and described, for operation with the springs. g

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

. DEWITT O. MARKHAM- 

